(M.Y.) "Great programs!...I purchased CME, PME, and Matrices made easy...I was able to do almost the whole course (college algebra) using the programs you guys put together...they are the best calculator tool(s) I have come across...and I have looked VERY hard on the net...the only tool that is remotely close is Derive...which I also own...BUT...Derive is not as user friendly...as yours is! Thanks a million!"